.calculator {
  font-weight: 100;
  width: 342px;
  margin: auto;
  background: black;
  .display-area {
    position: relative;
    height: 200px;
    width: 100%;
    color: #fff;
    text-align: right;
    padding: 20px;
    box-sizing: border-box;
    p {
      margin: 0;
    }
    .equation {
      position: absolute;
      margin-top: 20px;
      height: 56px;
      right: 20px;
      font-size: 44px;
      opacity: 0.9;
    }
    .result {
      margin-top: 90px;
      font-size: 52px;
    }
  }
  .keyboard {
    padding: 0 1px 1px;
    display: flex;
    font-size: 34px;
    -moz-user-select: none;
    -khtml-user-select: none;
    user-select: none;
    .button {
      text-align: center;
      line-height: 83px;
      display: inline-block;
      width: 84px;
      height: 84px;
      background: #f0f0f0;
      border: 0.5px solid #808080;
      cursor: pointer;
      &:hover {
        opacity: 0.9;
      }
    }
    .left {
      width: 75%;
      .action .button {
        font-size: 26px;
        background: #d9d9d9;
      }
      .span-2 {
        text-align: left;
        padding-left: 36px;
        width: 133px;
      }
    }
    .right {
      width: 25%;
      font-size: 48px;
      -webkit-text-stroke: 0.4px orange;
      .button {
        background: orange;
        color: #fff;
      }
    }
  }
}
